Electrically-operated controlling means for hydraulic elevators



Jan. 30, 1923. 1,443,388

G. L SLACK ELECTRICALLY OPERATED CONTROLLING MEANS FOR HYDRAULIC ELEVATORS.

FILED JULY 2. 1921 4 SHEETS-SHEET 1 Jan. 30, 1923. 1,443,388

G. L. SLACK. ELECTRICALLY OPERATED CONTROLLING MEANS FOR HYDRAULIC ELEVATORS.

FILED JULY 2. 1921. 4 SHEETS'SHEEJ' 2 Jan. 30, 1923. 1,443,388

G. L. SLACK. ELECTRICALLY OPERATED CONTROLLING MEANS FOR HYDRAULIC ELEVATORS.

FILED JULY 2. 1921. 4 SHEETS'SHEET 3' 4 SHEETS-SHEET 4 Jan. 30, 1923.

G. L. SLACK. ELECTRICALLY OPERATED CONTROLLING MEANS FOR HYDRAULIC ELEVATORS FILED JULY 2. 1921.

I l I l I I I l l I I l l I ll A w M M i NW N ma Z J EW WM a (0L 2 G M 4 w a w ,l 0. m m m etented Jan. 30, 1923.

UNITED STATES GEORGE LAWRENCE SLACK, OF BOSTON, MASSACHUSETTS.

ELECTRICALLY-OPERATED CONTROLLING MEANS FOR. HYDRAULIC ELEVATORS.

Application filed July 2, 1921.

To all whom it may co mzcrn Be it Known that citizen of the l.)

Controlling ,ans for l lydrauiic Elevators, of which the following a specification, reference bring had to the ac-;:o1n panying' drawn k This invention rela es to piling; elevators, and {)lltllilllflll to m ans whereby they may be controlled electrically In all electrically actuated con oiling dreulic l ..'or'-; men to me, the operating valve whereby water is admitted to or released the plunger inder or the casing o't an equivalent ope: 111;; member has been controlled through a working head and a pilot valve using water pressure the pilot valve being operated by magnets, and as the load on the pilot valve varies so does the speed of the magnets and thus the speed of stopping or st Jlnpj the car varies correspondingly. Sometimes as much as two minutes wil elapse before the car moves at full spee and other times only fifteen seconds elapse, and very rarely does it take the same time twiz e in succession to start or stop.

One of the objects of my invention to provide for a pos :ive control of the hy draulic valve electrically.

And another object is to provide electrically operatei'l means for starting or stop ping the car at the same sneed at all times and which will not vary e en to the fraction of a second notwitstahdinovariations in the load. 4

And a further object is to eliminate the working; head. pilot valve, and the heavy operating magnets and in place thereof to use an electric motor havi r a constant speed to actuate the operating valve routro'iling the low oil? water to or from the plunger cylinder.

:hiother obiect is. by eliminating the working head and pilot valve, to thereby eliminate a constant source of leakage, which lQtllfiHQG causes the car to creep.

another object is to provide, in the I l. l

Serial No. 482,274.

by pressing a control button, to stop the elevator which is moving upwaro or downward and under the control of another person.

And still another object is to provide means whereby the circuit through the actuating mechanism is broken at any time a door is opened when the car is in motion and unless the door of the elevator is fully closed.

Another object to provide means for breaking this circuit in. case a fuse blows or the current is interrupted from any .ise, whether the car is in motion or not, this means bringing the car to a stop ininic-zliatcly but being so constructml as to bri the to a stop ntly, this inechanism doing away with the necessity which present in all other forms of mechanism of this character known to me of the car continuing to travel to the top or bottom beiore stopiing, which is objectionable for the reason hat the first impulse of the operator or occupants of the car when it is found out that the car is out of control is to try and get out, which is a prolific source of loss of life.

A. further object is to provide a controlling; mechanism of such character that it may be used either for a car switch controlled hydraulic system. a semi-automatic hydraulic system, or a full automatic h draulic elevator system.

Another object is to provide in ('()lilllttion with the valve controlling the inlet and outlet of water from the plunger crlinzlcr a constant speed motor for operatnu; the valve, as before stated. and electrical n21 his for oi ierating the motor in one or the other direction as rrquired to shift the valve in one or the other direction, and means for automatically stopping the motor after the va ve is shifted a predetermined li:'-rt:-|,nce. this means including a current switching device rmitrolled by the motor which acts to anton'nitically switch off the current a ttcr the motor has rotated a rcrtein distance in one direction or the other direction.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein t Figure 1 is a diagram!) tic view of the switch board Y and the wires leadingtherefrom;

Figure 2 is a side elevation of the motor .i (ill,

(l ll and limit switch actuating means, the valve casing),- F and the supply pipe 15, the valve casino being shown in section, the switch board connected with the limit switches being); diagrammatically shown;

Figure 3 is a side elevation'o't" the floor stop mechanism, showing the wiring thereof;

Figure 4; is a diagrammatic view of the elevator with the door switch and the stop button switches, the wiring leading from the elevator being diagrammatically shown;

Figures 1, 2, 3 and l are to be read'together;

Figure 5.is a diagrammatic view illustrating the position of the limit switches when the car is descending;

l ig ure 6 is a like view to Figure 5, showing the position of the switches when the car is ascending;

Figure 7 is a top plan 0, P and Q;

Figure 8 is a section on the line 88 of Figure 3;

Figure 9 is a side elevation of one oil? the l'iolding magnets;

' Figure 10 is an end elevation thereof;

Figure 11 is a side elevation partly in section of one of the direction switches;

Figure 12 is an end view thereof.

In the drawings, 1 have shown diagrammatically such portions of a plunger elevator as are necessary for an understanding; of the mechanism. The electricalconnections are also shown diagrammatically.

In these drawings, A designates the usual cylinder within which the usual plunger B of the elevator operates, this plunger carrying the car platiorin C. The plunger moves through the usual stuffing: box D and water is admitted to the cylinder A or released therefrom through pipe which enters the head of the cylinder just below the stuffing box in the usual manner. The pipe E is connected at one end to a valve casing: F, one end l of this valve casing constituting a discharge passage. The valve casing adjacent its upper end is provided with the passage F connected to a supply pipe Operating within the valve casing is a piston valve comprising central. stein view of the cams having the spaced valves H, ll and mounted thereon. The piston valves H and ll are disposed relatively close 'tou'etl'ier as compared with the distance between the pisston. valve H and the piston valve ll. The space between the valves ll and ll? is approximately slightly. larger than the outlet machine. from the casii'ig' F to the pipe E. The valves H and H are spaced from each other suchv a distance that when the upper valve is disposed slightly above the inlet opening; Fflthe valve H will be disposed slightly below the outlet pipe opening of: pipe E.

- reassess It will be obvious now that when the valve stem G is raised above the position Also dis )osed within the len th of aiae E is an auxiliary controlling valve in the term 01": a cut-off valve, designated l,provided with a stems and pivoted upon a bracket extendingupward from the bonnet oi the valve casing I is a lever 1 pivoted to which is the stem of a small piston I operating within a dash pot l and designed to contain air. This piston I should be periorated so as to permit a very slow travel of the piston downward through the dash pot, or else the lower end of the dash pot may be formed with a valved opening 1 The dash pot may contain air and obviously if the opening 1? be greatly contracted, the descent of the piston l? will be relatively slow. This auxiliary valve 1 is designed to close in case a circuit is broken and be urged to a closin; position by means 0t the weight I mounted on the arm P. It is normally held raised by an electrically controlled latch, as will hereafter appear. i

It will be obvious now that when the piston va ve is in one position, water will. he s ipplied to the cylinder to force the plunger therein upward, and that when the car on the platiorm C has risen to a predetermined distance and has been, stopped, the valve will be shifted to the position shown in Fig];- ure which will hold the car in this position, preventing the outlet of water from the cylinder, and that when it is desired thz-itthc car move downward, the valve G is shifted uynvard so as to permit the outward passage of water from the pipe E and from the cylin' d r Ooeratinp in connection with the valve (:r a motor and an automatic limit switch therefor, the motor and the limit switch being: illux-itrated as being n'ionnted upon a 'cast iron bed plate J. The motor is designated l and may be oi any suitable type and has the usual motor shaft carrying: the usual iii-hiatus, this shafl't being tormented, by

is K to a shaf section L which carupon. it a worm L extending through uniting box and into a suitable casing: L

This worm engages with agear wheel N,

which year wheel. is attached to a shaft hi having an arm N connected by a con necting rod N with the coupling N operailiifl connected to the upper end of the stem of valve G. lVhen the motor operates in one direction, the gear wheel N will be turned in one direction, thuslifting the valve, and when the current reverses through the motor. the gear wheel N will be turned in the other direction, depressing the valve.

Carried upon the shaft N and rotating therewith are three cam disks 0, P and Q. The cam disk is formed with a socket til at one pointin its periphery, the socket being disposed ertically above the axial center of the rain (llSlifi- The cam diskl is formed with a circumterentially extending groove exten 'liug approximately half way around its circumiizi nce and terminating in a shoulder 63. The cam disk Q is also forn'ied with a circun ferentially extending groove approximately half the circumference of the cam disk and terminating at its end adjacent the recess in a shoulder 62. The mid dle ran). disk 0 is keyed to or otherwise mounted upon the shaft N for rotation therinvith and the cam disks and P are mounted concentrically to this shaft N but are rotatively adjustable therearound and with relation to the cam disk 0 and each other. This secured by slotting the cam disks 1 and Q, as at 34, there being an adjusting bolt 41 which is attached to the cam disk 0 and passes through the slots of the cam disks P and Q and is, of course, provided with nuts. By this means these cam disks P and Q may be rotatively adjusted relative to the middle cam disk 0 as before stated.

livotally mounted on a supporting frame, plate or other supporting means above the three disks are three arms. The middle arm 36 has a roller at its lower end which rests within the socket 61. The upper end of this arm carries a switch blade 30. The arm 35 which coacts with the cam P is likewise pivotally mounted and carries a roller at its lower end which o erates within the groove and is adapted to be engaged by the shoulder The arm 39 carries a roller at its lower end which engages in the groove of the cam disk Q, and is shifted by the shoulder 62. The arm 35 carries at its upper end a fiber plate 37 to which a switch blade 27 is attached, while the arm 39 carries at its upper end a fiber plate 38 to which a switch blade QT is attached. These switch b "es are insulated from the arms and roar-twith contact members, as will be later stated.

It will be noted that when the valve f is in the position indicated in Figure 2 and the car has stopped, the arm 36 is in a vertical. position and the switch blades 27 and 27 are in a vertical contact-engaging position. When the car is ascending, however, the shaft N will have been given a counterclockwise movement by the motor which will cause the rotation of the came in a counter-clockwise direction, thus shifting the pivoted arm 36 from its middle position toward the right in Fig ure 2. This rotation continues until the Sl'lOlilClfil' 62 strikes the roller on the lower end of the arm 39, when this arm 27 is shifted from its contact-engaging position (see Figure 6), breaking the circuits, as will be hereafter described. The position of the parts illustrated in Figure 5 is the position taken when the car is descending. The position taken when the car is ascending is illustrated in Figure 6, where the cams are shown as havin been turned in a counter clockwise direction, causing the shifting of the limit switch arm 36 to the right from its median position and causing the switch blade 30 to shift away from its corresponding contacts, while the switch blade 35 re mains in engagement with its contacts. This shifting of the arms 35 and 39 is accomplished by the engagement of these arms by the shoulders 63 and 62 respectively.

The car C is provided with a. casing or box having therein a plurality of switch buttons such as are used in automatic electric elevators, there being a button to be depressed in order to bring the car to a stop and a series of buttons, one for each floor. I will assume that there are three floors and that there are, therefore, three switch buttons designated respectively T, T and T T being for the first floor, T for the second floor and T for the third floor, and that there is a stop button T whereby the elevator may be brought to a stop if it is desired to change the direction of the elevator before reaching a floor, the elevator being brought to a stop by the action of this button and then a button pressed to cause the change in direction of the car and its movement to the floor desired.

It will be understood, generally speaking, that when a person enters the elevator at the first floor and desires to go to the third, he will, after closing the doors of the ele- "ator, press the button for the third floor. This will cause. through mechanism to be hereafter stated, the closing of a circuit through the motor and the motor willv shift the valve G downward. The motor will be brought automatically to a stop as soon as the valve has been shifted sutliciently to cause the supply pipe F" to be connected to the pipe E and the water will pass into the cylinder and beneath the plunger and the elevator will move upward until the third floor is reached and at this third floor electrical mechanism will operate to again actuate the motor to cause it to shift the valve G to its neutral or hold ing position so as to bring the car to a. stop. If the car is left at the third floor and a party on the second fioor desires the car, for instance, he presses the button at the second fioor, whereupon the electrical position and which is driven inecliaiiism is actuated to cause the descent of the car to the second 'tloor, where the car will. stop. The operator then presses the buttonindicating the floor to which he desires to go and this causes the energizing oi? the motor and causes it to rotate in one direction or the other so that the elevator again moves to the floor desired and comes to a stop, and so on. The specific mechanism w iereby this is accomplished is as follows:

The car is controlled (Figure 1) by a pair of magnets designated respectively US and DS designating up and down), these magnets controlling the direction switches whereby the car is caused to move either up or down by a series of relays 1 2 and 3 corrcspoiuling to the several floors (there being assumed to be three floors) and a series of holding magnets 1 2" and E corresponding to the number o'l floors, the relays closing certain contacts and the holding magnets closing certain contacts, the map;- nets constituting the direction switches also closing); the circuit contacts will hereafter more fully appear These several sets of magnets and the contacts controlled thereby are connected to the motor, to the limit switches and the centering switch, to the buttons on the several floors, to the buttons on the car and] to the floor stop device as will hereafter appear.

7 Before explaining thecircuits which are controlled by the several switches and magnets. it will be well to explain the mechanical construction of the door stop device (see Figure 3) which is located in any suitable by a chain X leading from a sprocket on the driving; shaft supporting the usual. overhead sheave. fiver this leave pass theusual cables which are weighted to counterweight the elevator. This being common construction, it is not believed. necessary to illustrate this construction. The chain X passes over a sprocket wheel 66 mounted upon a shaft (56, which shaft has thereon a worm 67 and operates in suitable her rings. Mounted upon the worm (3'? is a travelling; nut 68 which, as the worm rotates, shifts in one direction or the other. This travelling; nut carries upon it a longitudinally extending"; slotted cam bar 69 'lorined with a slot (39, which slot intermediate its ends is formed with: an oil-set portion 70. In other words, the two end portions of the slot are oft-set with relation to each other and connected by this cam portion 70. This bar slides in guides formed in a frame 6?)" and mounted upon this frame are a series of vertically extending switch rods, designated respectively 71, 89 and 96 and corresponding; to the several floors. the switch rod 71 corresponding to the first floor the switch rod 89 corresponding to the second floor, andthe rod 96 corresponding to the third l'loor. These rods are urged downvard by slot in cam bar (it). The rod 96 carries upon it the contact 97, the rod 89 carries uopn it the contact 84, and the rod 71 carriesupon it the contact 44.

Disposed below the contact 4d are a pair of contact members as and 49, disposed above the contact 97 are a pair of contacts 83 and 90 disposed below the contact 84 are a pair of contacts 82 and 82*, and disposed above are contacts 85 and 88. When the slot ted bar (39 moves to the left in Figure 3 and the cam shoulder striltes the roller carried on the lower end of rod 96, this switch rod rising, carries its contact 9? into engagement with the contacts 83 and 90. When the cam SlOtlltlQl" 70 reaches the roller on the lower end of switch rod 89, this switch rod rises, breaking he connection between the contact 84; and contacts 82 and 82 and contact at making connection with the contacts 85 and 88. When this cam shoulder 70 reaches the roller on the lower end of the switch rod 7 1A the contact tel: rises, breakingconnection between thecontacts 4: and contacts l8 and 49. Uponthe reverse movementot the cam bar 69, the several switch rods 71, 89 and 96 move downward, the contact id electrically connecting the contacts l8 and 49, the contact 8d electrically connecting the two contacts 82 and 82 and the contact 97 breaking engagement with the contacts 83 and 90. The action of this floor stop mechanism in stopping the car at a predetermined floor will. appear hereafter; The switch Y constitutes the means whereby the power from the sourceot energy may be communicated to the apparatus through the switch poles 1 and 27. (Figure 1).

I The, connections between the several switches. buttons. motor. etc, will most readily appear by a description of the operation of the various parts. As before eX- plained" the mechanism which I have illustrated inthe accompanying drawings is for a full automatic electric hydraulic control, wherein it the car is at one floor it may be caused to move to any other floor by the closing of a button switch at that floor, the car moving to the floor specified and stopping automatically at this floor, and wherein the car may then be caused to move to any floor desired by a person within the car by pressing: the proper car button, whereupon the car will move desired and stop at this floor.

Assuming now that the car is at the third floor and a person on the first floor wishes the car. then he presses the first floor butten 90. (Figure 4:). The current then comes from the negative side 27. The current flows from 27' by way of wire a to binding post 8 on the switch board, then by way ot wire 6 through the first, second and third floor door lock switches 32, 3 and e, and thence automatically to the floor by conductor (1 to binding post 5 at the cable head in the elevator well through the operating cable by wire 0' to the car door switch (3, thence by wire (5 to one side oi stop button 7 in the button box on the car, and through the stop button 7 to binding post 8 which is common to all the buttons. The car door switch may be of an suit able character and simply consists of a switch which, when the door is closed, coinpletes the circuit between wire 0 and but which, when the door is open, automatically breaks this circuit. I have illnstrateo a pivoted member (5 having a contact (5" which, when the door is chised, bridges the gap between the contacts (5 and (5. I do not wish to be limited, however, to any partiliilar :t'orui of the car door switch.

The button box on the car is fed by a copper plate 9 to which the binding post R lastened. The several lioor buttons I, I and are fed from binding 'Jost which is connected to a. wire (Z which extends to the binding post S) in cable head and by a wire (5 which extends from the binding post 9 to a wire 10 which common to the first, second and third floor push buttons 90, 91 and 92. The current comes down 011 the common wire 10 to the first vtloor button 90 which has been closed, and from thence b wire c to binding post 12. on switch. board Y, thence by wire a to relay l, thence by wire c to binding post at, thence by wire 1 to the retarding switch contact 13 on. the switch blade on the limit switch and 'i'rom the contact 12 by wire 7 to binding post 2 which is connected to the positive side 1 of the line by a wire 7". This completes the circuit through the source of currentand 1 relay, which is the first floor relay. The energizing of this relay causes the contact 14 to electrically engage the con-- tact l5 and the contact 16 to electrically enge the contact 17. The current passes from the negative side 27 of the line by means of wires (1, I), c, c, 0*, (Z and d to the '-.\'irc It). as before stated, but from this coniinon wire 10, however. a wire lcads to binding post 2 3' From this binding post; a wire 9 leads to a wire which is connected to the contact h"; of l relay, contact 20 of 2 relay, and contact 24- of 3 relay. Assuming, therefore, that the 1 relay energized and the contact 16 is in engagement with the contact 17, then the current pfrom the vire 5 by way of contacts 16 and 17 to wire f The current then passes along the wire 9 to binding post 28. thence through holding magnet 1 to binding post 26, from this binding post by way of wire to contact 15, thence to contz-ict 14 on wire 7 and from wire 7' ba ck to the positive side l of the line, thus energizing the first floor holding magnet 11". The energizing of the holding magnet i." causes contact :ll)

to electrically engage contact 43 and also causes contact 3i to electrically engage contact- 32. Then the current comes from the negative side 27 ot the line by way of wire In to the binding post 8 and thence by wire it the current travels to a conductor It and by wires 1' to contacts '28 and 28 on each side of the limit switch in Figure As the (211' is intended to descend, it will cause the current to pass from the contact 28 to the contact 26 through the switch blade 27, and from this contact 26 the current passes by a wire it to abinding post 11 on the switch board. From here thrcurrent passes by wire hi to binding post (35, through the down direction switch Db to binding post 12, thence by wire i to binding post 22, thence by wire 21 and wire i? to contact 49 which coacts with the first tloci' stop switch rod 7 l. The switch rod Tl be ing lower d, as illustrated in Figure 3, the current passes from 43) to l and from thence by wire 2 passes to binding post 18 thence in wire i" to contact 4:15 on #1 holding magnet. Inasmuch as the switch blade 4:0 engages this contact 43, it allows the current to pass from contact to switch blade -10 which is connected by the wire to wire f", which in turn is connected to the positive side oi the line at 1. This energizes the down direction switch and. causes the motor to rotate, as will be new stated.

The energizing oi the down direction switch D5 causes an electrical engagement between the contacts 1- and 2 and contacts 8" and 7, the energizing of the up direct-ion switch causing the closing of the contacts I to 13 and 0t 15* to 143. The down direction .switch being energized, closes the circuit through the motor as follows: The current comes from the positive side 1 of the line by the wire y' to the contact P, the wire j being connected to the contact 1 of the down direction switch and the contact 1 oil the up direction switch. be down direction switch being closed, current passes from 1 to 2 and from 2 through the switch to the contact 3 and from thence by wire to contact 3*, thence by wire j to binding post t on the motor. through the armature thereof back to binding post 5 on the motor by wire j to binding post 1 on the switch board and thence to contact (3 on the down direction switch by means of wires j" and f, y" being connected to the contact G of the up direction switch and the down direction switch both. From 6 on the down direction switch the conductor leads to the contact 7 which, being in electrical engagement with 8, causes the current to pass through 8 to wire 6 to the binding post 9, from binding post 9 by wire to contact 9 on the down side of the limit switch. through the switch blade F27. to contact 28, thence by wires 7& and J2" and wire it to binding post 8 from thence by wire a back to the negative side 27 of the line, thereby energizing the armature circuit of the motor. One side of. the shunt field of the motor is fed from the positive side 1 of the line by way of wire 7' to the contact 1 thence to the contact 2, from thence to the contact 12 for the down direction switch DS, thence by wire 8 and wire l to binding post 5 oh the switch board, thence by wire Z to binding post 11. on the motor, through the shunt field to binding post 10 on the motor. from thence by wires l and h and h to binding post 8, thence by wire a, to 27 on the negative side of the line. Thus the motor is caused to rotate in a direction to cause the upward nio'vcn'ient of the arm N and the upward movement of the valve stem G to thereby relieve the pressure of water beneath the plunger B and permit the plunger and the car to descend. The rotation of the motor revolves worm L, which causes the worm gear N to revolve and this moves the arm N which is connected to valve stem through the connecting rod N causing the valve stem G to move upward and causing the cup packings or pistons H, H and H to move upward until the pack ing H moves by the port leading to pipe E, and this allows the water to be discharged from the cylinder through the circuit breaker valve 1 and allows the car to descend.

lVhen the shaft N revolves in a clockwise direction, it also revolves cams O, P and Q, in the same direction. The instant that cam 0 moves toward the right from the position shown in Figure 2 to the position shown in Figure 5, it moves the lower end of. the arm 36 to the right, causing the switch blade 30 to move to the left to the position shown in Figure 5, connecting the contacts 11 and BC. This switch blade moves against the action of the centering spring eli which tends to urge the switch blade back to its normal or central position whereit connects thecon- 'tacts 12 and 13. lVhile the cam O is moving to the right, the cam P also moves to the right in Figure 2 and the shoulder on this cam further engages the lower end of the lever of the down limit switch .27 and moves this switch blade 27 to the left. as illustrated in Figure 5, therefore breaking the circuit between contact 28 and the contact 9 which is the armature circuit, and between the contacts 28 and 26 which are in thedown direction switch circuit, releas- .ing the down direction magnet of the down direction switch US, also breaking the shunt field circuit and causing the motor to stop and leaving limit switches 27 and 27 in the position shown in Figure 5. This is the position of the limit switches when the car is descending. Under these circumstances. the contacts 28 and 16 are connected and from this point on, however.

the contacts 28 and 26 are connected. In other words, the limit switch blade 27 has been left in its initial position, that is the position shown in Figure 2, but the limit switch blade 27 has been opened. Inasmuch as the contacts 12 and 13 are open, no one can interrupt the use of the car while it is in motion.

In this position of the parts. the holding magnet for the first floor 1" is still being held energized, this magnet getting its current, as before, from the negative side 27 of the line, through the car switch buttons and the car door switch, and back to binding post 2 -5. The #1 holding magnet 1 .urrent as follows: The wire m connects with the wire g at 9st and extends to contact 32. As the contact ill is engaged with 32 through the energizing of I current flows from 32 to 31 and from. 2-11 to post 28, through 1 to the point 26 on wire 7", thence by wire m to binding post 15 thence by wire m to contact 48 of the floor stop switch for the first floor, to contact 44-, by way of wire to binding post 18 and thence by wire 2'' to contact 43, thence to the switch blade 40 and-from the switch blade by wire and wire 7" to the positive side 1 of the line. This completes the circuit through the holding magnet for the first floor 1 and keeps this magnet energized.

As the car descends from the third floor toward the first floor, the worm GT is caused to revolve by the sprocket wheel 66 which, as before remarked, is connected to the overhead sheave shaft, and as the worm 6'7 revolves it moves the travelling cam bar 69 to the left through the nut 68, and when the cam shoulder or offset 70 engages roller 71 of the first floor stop switch 4%, it shifts the switch bar et l upward. breaking contact between 48 and a l. which releases the holding magnet 1 This causes the corn tacts 31 and 32 to separateand shifts the switch blade H) from its engagement with contact 48 into engagement with the contact 72. This causes the ire-energizing of the motor circuit so as to cause the motor to rotate in a direction reverse to that first taken to thereby cause the descent of the valve stem (l to carry the cups H and H into the position shown in Figure 2 to thereby cause the stoppage of thecar. The ale-energizing of the holding magnet 1 causes the disengagement of blade lt) from the contact a3, and breaks contact between the contacts 31 and 32, and then the cur rent comes from the negative side 27 of the line by wire a to the binding post 8 down by wire it and wire 7L to the limit switch contact 28", and thence by the switch blade 27 to the contact QG thence by wire a to binding post 10 thence by wire it, to binding post '76, which is one side of the up iii) direction switch US, through the coil of the up direction electro-magnet of this switch to binding post 11. and thence by wire "1: (0 binding post 21, thence by wire 0 to contact it coax-ting with the centering :-;wil:c-i.- hhidc ill). The centering switch 3i) being closed, that in engagement with the contact ii. the current from 1'2"" to contact Fi from thence by wire 0 coinnion to both contacts BC to binding post is from thence by wire 0 to contact 75, thenc to the coi'itaet member T l oi holding; magthen by wi e 0" to contact '73 ot the holdu magne th nce to the contact s it t iereol, thence to wire 0 to contact co to 40 o l holding magnet 1. then to wire 7', theme by wire to tire side of the line at 1., thus con =r' cuit tlirougzh the up direction which causes the closirg o'i' thc and le -3 15 and 14- by means; wires heretofore descriheib closing- 21 through the up si itch and causmotor to revi'ilre in the opposite on to that in which it originally diib therel'r-y revers ng the operation and, moving the valve stem (i downward until the passes pipe E, closing this pipe and oping; the car. ll hen the pipe is closed, the cam has urncd to its normal position and in its on of returning to its normal position moves the centering switch blade 30 from the position hown in Figure 5 to its middle ion thereby breaking the circuit be- ;aeen il and RC, which releases the magnet, of the up direct-ion switch US, stopping the motor also. As the centering switch blade 30 returns to its center. it closes con tacts 12 and 13 and the limit switch blade 26 electrically engages contacts 28, 9 and 920 of the limit switch. therefore leaving the car ready for operation from any floor at any time and in the position shown in his ire 2. its the car descends. the cam or J 70 oi the floor stop cam bar 69 goes by the switch rods 96 and R9 and throws the f-I .\'I.i( to be sent to either landing.

in order for a person within the car to send the car up to the second floor from a lower lioor, as tor instance the first floor, the s-iecond floor button T on the car is pressed. Then the current comes from contact plate 93, which. gets its current, as previously mentioned, through the door switches door button, e c, and so from the negative side 27 ot the line. The current flows from contact plate 93 through the operating cable to the bin in post 77 by wire 7), thence by wire 7/ idinn' post 13 on the switch board. thence by wire p to and through the second floor relay to wire thence r i to binding post 41 from "o the retarding switch contacts 12 ot the line 'l and 13 by wire (.5 thence by wire f to bindin post 2 thence by wire 7'" to the positive side 1 (one) of the line. Thus the s cond floor relay energized. This closes contact to contact if) and 20 to contact 21. Thc circuit from the negative side of the line to the common wire has been previously traced. From this common wire 10 the wire g leads to the binding post 23", from this binding post lead the wires 9 and to contact 20, and the contacts 2') and 21 being closed allows the illllGIlt to pass from and 2]. by wire to T9. which is one side of the second floor holdinglfli-iflliift fi The current passes througz'h this second Floor holding;- magnet to the point 78 and thence by wire 1' to the contact 15), i'rorn the contact 11) to 18 and l'rom the contact 18 by wire f to the positive s de l. of the line. This completes the circuit througrl: the econd iloor holdingmar'net 2 shitting the contact 4-2 into engagement with the contact 80 and closing contacts 86 and 87. Then the current comes from the mega tire side a the line to binding post 8 w 21) ot wire and from thence by wire 71 and wire to contact 28 on the up side ot the limit switch. From 28 the current passes to 26 via switch blade Qi and from 26 by wire it to binding post 10 on the switch hoard.. thence by wire 2" to binding post 76 ot the up direction switch US through the unranet oi this switch to hind'iiur post llz'trom thence by wire it to binding post 21 and trom thence bv wires 0 and o" to contact 83 on the floor stop device, this ward by the cam bar 69 on its leftward movement. and current passes from contact R8 to the contact 84, thence the current flows by wire if to binding post 19, from thence by wire 1; to contact 5 70 of the second floor holding magnet 2. The switch 42 being closed or in engagement with this contact 80, the current passes to {4-2 and from thence by wire 0" to contact 72, throrurh switch 40 and by wire 17 to wire f to the positive side 1 his closes the circuit through ion switch, as previously de thus lt-y closing the contacts 1 and 13 and 15 and Lt, closes the circuit through the motor. operating the Valve stem 5 tl'iroue h the worm gear and worm as preriously described, causing the "valve stem to more do in until the packing 71 passes by the pipe la opening the same and establishina innuni ation between the supply pipe F and pipe E the pressure of water passing into the cylinder forcing the car to ascend.

The moment the cam O revolves to the left. as illu t ated in Figure 6 it moves the lower end or the centering switch 30 and causes the switcl'i blade to more toward the right, closing: contact: .23" and Rt. i\t the same time the shoulder 62 engages the lower end of the limit switch 27 which moves this switch blade 2'7 to the right, thereby breaking the circuit between 28 and 16, which is the armature circuit as previously described,

and 28 and 26 which is the up direction switch circuit, releasing the up direction switch (which opens shunt field)and stopping the motor, as in Figure 6, which figure shows the position of the limitswitches when car is ascending.

Inasmuch as the switch blade 30 has left the contacts 12 and 13, it will be obvious that nobody can interrupt the use of the 3211 while it is in motion. As the car ascends,the worm revolves and the travelling nut 68 moves the cam bar 69 toward the right. hen the cam. shoulder or off-set '70 engages the roller on the second floor switch 89, it draws the switch 89 downward, breaking engagement between contact 84 and contact 85, w iich releases #2 holding magnet 2, which in turn breaks engagement between the contacts 86 and 87 and at the same time closes switch blade 42 to contact 73. This causes the operation of the down direction switch on switch board, causing the motor to revolve in the opposite direction, thereby reversing the operation and moving valve stem G upward until cup H passes pipe E, closing the same and stopping car.

In order to accemplishe this, the current comes from the negative side 27' of the line to binding post 8 on the switch board by way of wire 0,, from 8 by wires h, It and ]L2 to contact 28 on the down side of the limit switch, and thence to 26 from thence by wire 7& to binding post 11 thence by wire 72, to the binding post 65 of the down direction switch DS, through the magnet of this switch to binding post 12, thence. to

binding post 2 by way of wire 71, from thence by wire i and r to contact 12 The centering switch blade 30 being closed, as illustrated in Figure (3, current passes from 12 to RC and from thence by wire 0 to binding pi at 6 and thence by wire 0 to :outact '75 of the third floor holding magnet 3 thence to the contact 7-1, thence by wire 0 to contact 73, thence to contact 4:2. thence by wire 0 to contact 72, thence to contact ell), and thence by way of wire and 7" back to the positive side of the line 1, This operates to down direction switch D, as previously explained, and moves valve stem Gr to its stop position, stopping the car and, of course, acting to return the limit switch to its middle or stop position, as shown in Figure 2.

l. have heretofore described the means whereby a person on the first floor may secure, by pressing a button, a return of the car from an upper floor to the first floor, and I have described the means whereby a person within the car by pushing the proper button may cause the car to move from the first floor to the second floor. It will be obvious, however, that the same operation performed only with a different button when it is desired by a personon any one floor to cause the car to move to that floor, or when it is desired by a person within the car to cause the car to move to any desired floor. his not believed necessary to trace all of the circuits which are caused to close or open under these circumstances, this being obvious to those skilled in the art.

The holoing switches are shown diagrammatically in Figure 1, but in Figures 9 and 10, l show detailed views of the holding switch so as toillustrate its exact constructiou. In these figures V designates the frame supporting one of the holding magnets, as for instance the nia-gi'ict 1 Pivotcd upon the frame. Vis a lever V carrying a screw V coacting with the magnet 1 This screw carries the contact 81 which coacts with the contact 32. The opposite end of the lever carries upon it a cross bar constituting the contact 10, this cross bar, when the magnet is energized, engaging the contact- 43, and when the magnet is de-energized engaging the contact 72, the armature being carried away from the pole of the magnet 'whent-he magnet is de-energized by means of a spring, weight or any other suitable device of thischaracter. The contacts. 1.4 and 16 are mounted upon a like lever to that ilustrated in Figure 9 so that upon an energizing of the relay magnet 1 the contacts 1 1 and 16 will be brought into engagement with the contacts 15 and 17. It is not believed necessary to illustrate this particular circuit closing device, as it will be obvious.

The direction switches are constructed in accordance with Figures 11 and 12, which illustrate the direction switch In these figures, V designates the magnet of the direction switch, and W an armature which is pivoted upon the frame of the magnet and which carries the contacts 2 and 7. Pro jecting laterally from the armature blade V is the contact W When the magnet TV is energized, it draws the armature downward and the contact 2 engages the contact 1*, whilethe contact 7 engages the contact 8. At the same time the contact 3 enthe contact 12, this contact being supported by a spring W so that this contact is closed just before the contacts 2 and 7 engage the contacts 1 and 8. Of course, the armature N is urged upward by a spring or any other suitable means to that end.

ith regard to the functioning of the direction switches US and DS, it is pointed out that in the neutral or zero position of the shaft N and the valve, that is the ho1ding position when the elevator is at rest, the circuit is completed through both the limit switch blades 27 and 27 but not through the centering switch blade 30 but this circuit is bri'vken between the contacts controlled by the direction switches. lVhen the circuit is closed through one direction switch magnet, as by the pressing inward of the proper floor button or the selected car button, the current travels in one direction through t motor and through one of the limit switches and the motor is operated in one dire tion to shift the valve into its selected po 'tion from i s holding position. Then when the valve is t y shiited, the circuit is automatically broken through the limit switch blade which has been in circuit with the motor and the reverse circuit is partially completed by the centering switch 30 engaging the contact 1.1 with the contact Rt or the contact 12 with the contact BC. This circi'iit, however. is only partially completed as the circuit simply remains broken or interrupted a the floor switch for the particular noor at which the car is to stop. Thus when the proper floor switch is closed, current revei through the motor until the valve in irs held or stop position, when current i gain broken automatically by the he centering switch blade 30 moving to its middle position under the action of the rotating cam Q. i

It will. be seen that when one oi the direction magnets is energized and the contacts closed, current passes in one direction through the armature and shunt circuits at .d that when the other direction magnet is closed, the current passes in the opposite direction tine-ugh the armature and shunt circuits oi the motor. Thus the 'l :ection switches US and DS constitute reversing switches and the centering switch constitutes means when one of the direction switches is energized oi? nitting the circuit of the other direction switch in condition to be energized.

From l' igures l and 2. it wi l be seen that the magnet 50 is connected in circuit by means o l the wires a and a with the positive and negative poles of the main power switch Y, Thus the magnet 50 is at all times energized unless a fuse should blowout or the power should be cut off in some way on the main nc. 'lhese wires a and s are also coni .ll be seen from Figure 1. to and espe ti ely so that ii the rr nteal from an' -c (muse the amt-3r eiahteiil cable"; SUDDOIlTiIJS! the elevator and 7 .he shaft Z tend t ry tha the sheave on shaft positive engagement with the shaft Z and it is aimssay to provide the limit nuts 67 ew-sha ft 67. These limit nuts also it at each end of the travel. of therelw taking care of slippage is (9f the counter-weighted cables. This construction forms no part of my present invenuieuiltcr G l'riction and not through a tion but. is merely stated so as to show that means may be readil provided for preventing the slippage 0 the counter-weighted cables from aifecting in any way the floor stop mechanism.

I claim I l. A hydraulic elevator including a car and hydraulically actuated means for shifting the car, of a valve controlling the passage of water through said means, said valve having an inlet position, an outlet position, and an intermediate holding position, a re 'versible electric motor, operative connections between the motor and the valve whereby the valve may be positively shifted in either direction to its various positions by a movement of the motor in one direction or the other, selective means for actuating the m0- tor to cause a rotation of the armature shaft in either direction to thereby shift the valve toward or from its intermediate holding position and toward or from either of its other positions, and means for automatically stopping the motor when the valve has moved a predetermined distance in one direction and has reached. its inlet, outlet or holding position.

2. A. hydraulic elevator including a car, hydraulically actuated means for shifting the car, a valve controlling the passage of water to said means, said valve having an inlet position, an outlet position and an intermediate holding position, a reversible electric motor oneratively connected to the valve to shift it, means for actuating the motor to cause a rotation of the armature shaft in either direction to shift the valve toward or from its intermediate holding position, and means for automatically stopping the. motor when the valve has moved a predetermined position in one direction andv has reached its inlet or holding position, including an oscillatable member driven by said :a tor in a direction corresponding to the direction of movement of the motor, a switch blade normally held in a circuit closing position. and a member driven by the motor and operatively engaging said switch blade to shit't it from its circuit closing position when the motor has rotated a predetermined mount.

hydraulic elevator including a car, l'- lrau '.;ally actuated means for shifting r. a valve controlling the passage of water to aid means said valve having an i let position. outlet position and an iediate holding position. a reversible electric motor, operative connections between the motor and the valve. means for actuating the motor to cause the rotation of the armature shaft. in either direction to or from its holding position including a pair switch blades disposed in a normally interrupted circuit with a source of energy and said motor, one of said switch blades partly closing a circuit through the motor and the sourceof energy is onedirection, the other or" said switch bladespartly closing a circuit through the motor and the source of energy in the other direction, manually controlled means-for closing the circuit through eitherone of said switch blades to thereby cause" the rotation of the motor in either direction, and means for automatically shifting the switch blade through which the circuit is closed from its circuit closing position and thusstopping the motor when the valve has moved a predetermined distance in one direction-and has reached its inlet, outlet or holding position comprising an oscillatable meniber driven in a direction to correspond to the direction of movement of the motor, said member when shifted in one or the other direction a predeternjiined amount operativelv engag ing the switchblade through which the circuit is closed and causing the opening of said switch blade.

4. ii hydraulic elevator including a car,

versible electric motor, operative connections between the motor and the valve, means for actuating the, motor to cause the rotation of the armature shaft in either direction to or :lrom its holding position including "a pair of switch blades disp'osedlin a normally interrupted circuit with a source of energy} and said motor, one of said switch blades closing a circuit through the motor and the source of energy in one direction, the other of said switch blades closing a circuit through the motor andthe source of energvin the other direction, manually controlled means for closing the circuitthrough either one of said switch blades to therebv cause the rotation ()fild motor'in either direction, and means for automatically. shitting theswitch blade through which the circuit is closed fromits circuit closing position and thus stopping the motor when the valve has moved. a predetermined distance one direction and has reached. its inlet, outlet or holding position comprising an oscillat' ale member driven in direction to correspond to the direction: of movement of the motor, said mem her having thereon spaced shoulders each associated with one of the switch blades whereby when the member is oscillated in one direction by the motor one of said shoulders will engage the corresponding switch blade through which the circuit is closed and shift the switch blade to open the circuit. v

5'. Al hydraulic elevatorincluding a car, hydraulically actuatedneans=* for shifting reaches the car, a valve controlling the passage of water to said means, said valve having an inlet position, an outlet position and an intermediate holding position, a reversible elecric motor, operative connections between the motor and the valve, means for actuating the motor tocause the rotation or the armature shaft in either direction to or from its holding position including a pair switch blades disposed in a normally interrupted circuitwith a source of energy and said motor, one of said switch blades closing a circuit through the motor and the source of energy in one direction, the other oi? said switch blades closing a circuit through the motor and thesource of energy in the other direction, manually controlled meai'is for closing the circuit through either one of said switch blades to thereby cause the rotation of the motor in either direction, and means for automatically shifting the switch blade through which the circuit is closed from its circuit closing position and thus stopping the motor when the valve has moved a predetermined distance in one direction and has reached its inlet, outlet or holding position comprising an oscillatable membe' driven in a direction to correspond to the direction of movement of the motor, a shaft upon which said member is mounted, a worm wheel carried by said shaft, a worm actuated by the motor and engaging said worm. wheel, said member having a pair of shoulders coacting respectively with the respective switch blades wherebv as the motor rotated in one direction said member will be rotated to'carrv its shoulder into engage ment with the? switch blade through which the circuit is'c'losed to cause the switch blade to open and thereby break the circuit through the motor.

6. A. hydraulic elevator including); a car.

hydraulically actuated means tor shifting the car, a valve controlling the passage of water to said means. said valve being lougi tudinally shittable and having an inlet we tio'n an outlet position and an intern'iediate holdingposition, a reversible electric motor. a worm carried thereon, a shalt, a worm wheel mounted upon the shal t and engaged b v said worm. an arm on the shaft opera tivelv con ected lo t e va ve o shil't it as i i id means for i rota on of or its interludiruli a trail 1h which sai l p i. said cmitaets lflElUtI we llCdllV connected. to the motor and to the source oi' current, one pair oi contacts. when the circuit is closed therethrough. acting to cause thecurrent to flow in one'direction through the motor and theother pair oit contacts, when; the circuit" is closed there through, acting, to cause the current to flow in the other direction through the motor, means normally holding both of said switch blades in engagement with their respective contacts, means for closing a circuit through either one of said switch blades and the source of current to thereby cause the actuation of the motor in one direction or the other, and means for automatically shitting said active switch blade from its contact engaging position to break the circuit when the valve has reached a predetermined position comprising a rotatable member having spaced shoulders, said shoulders corresponding to but being normally spaced from operative engagement with the switch blades but upon a rotation of the shaft in one or the other direction operatively engaging the switch blade through which the current is passing to shift it out of engagement with its contacts to thereby break the circuit through the motor.

7. A hydraulic elevator including a car, hydraulically actuated means for shifting the car, a valve controlling the passage of water to said means, said valve being longhtudinally shiftable and having an inlet position, an outlet position and an intermediate holding position, a reversible electric motor. a worm carried. thereon, a shaft, a, Worm wheel mounted upon the shaft and engaged. by said wornn'an arm on the shaft operatively connected to the valve to shift it as the worm wheel is oscillated, means for actuating the motor to cause a rotation of the armature shaft in either direction to shift the valve toward or from its intermediate holding position including a pair of switch blades. contacts with which said blades normally engage, said contacts being electrically connected to the motor and to the source of current, one pair of contacts, when the circuit is closed therethrough. acting to cause the current to flow in one direction through the motor and the other pair of contacts, when the circuit is closed therethrough. acting to cause the current to flow in the other direction through the motor, means normally holding both of said switch blades in engagement with their respective contacts. means for clo circuit throug i either one of said switch blades and. the source of current to thereby cause the actuzr tion of the motor in one direction or the other. and means for auto atieally shifting said active switch blade tron! its conta t eugaging position to break the cir uit when the valve has reached a in'i-vdeterinilied position comprising a rotatable member. said member inclurling two se tions adjustable with relation to each other and each of these sections having a shoulder. the respective shoulders coaeting with the respective switch blades but being normally spaced therefrom a rotation of said shaft and member from an intermediate position causing one of said shoulders to engage the active switch blade and shift it from its contact engaging position after a predetermined rotation of the member to thereby break the circuit through said motor.

8. A hydraulic elevator including a car and hydraulically actuated means or shifting the car, oi a valve controlling the passage of water through said means, said valve having an inlet position, an outlet position and an intermediate holding position, a reversible electric motor, operative connections bet-ween the motor and the valve whereby it may be shifted to its several positions, means for actuating the motor to cause a rotation of the armature shaftin either direction to shift the valve to or from its holding position and including two sets of: contacts, a pair of switch blades coacting with the respective sets of contacts, means nor mally urging said switch blades into engagementwith said contacts, said. contacts beinc' thereby connected in an interrupted circuit with the motor and a source oi. energy. n'ieans for closing a circuit through the sou rcc of energy and either set of said contacts and the corresponding switch blade, means for breaking the circuit through the active switch blade after the valve has moved to its selected position from an intermediate. closin; position including a member oscillated by the motor and having a pair of shoulders normally engaged spaced, from but adapted to engage with one or the other oi? the switch blades to shift the active switch blade out of its contact engaging position after a predetermined rotation of the motor and a prederermined movement of the valve. and means actuated by the movement of the member to its switch blade shitting position automatically closing at one point a reverse circuit through the motor, means for completely closing the circuit through the last named means to cause the motor to revolve in the opposite direction, the reverse rotation of the motor causing the last named circuit closing means to break the circuit through the motor after the motor has travelled in a. reverse direction a prcdclermined ii-5 amour! 9. In a hydrailic e valve therefor operable I. o mediate holding pesition to 01 position or fil'l ii lltlGi position electric motor operatii c valve to positi 'cl t' lli'l ll illlfiir! mtermediatc position by a rotation of lhc l o-- tor in one (lirm'rtirm or the other. man controlled. electrically operated selective means causing the current to lion in one or the other direction through the motor to thereby actuate the motor in one or the other direction, and motor operated. means automatically breaking the circuit through the motor after the motor has been started and. a predetermined number of revolutions have been made.

it). In hydraulic elevator, at controlling valve therefor, a reversible electric motor operatively connected to the valve to shift it, said valve having an inlet position, an outlet position and an intermediate holding position, manually operable selective means for directing current through the motor in a direction to shift the valve from its intermediate holding position toward its inlet or its outlet position, n'ieans acting to automatically break this circuit through the motor when the valve has reached its inlet or outlet positions, means to direct current through the motor in a direction to cause the valve to move to its intermediate or holding position when the elevator has reached a predetermined height, and means acting automatically to break the current through the motor when the valve has again reached its intermediate and holding position.

11. In a hydraulic elevator, a controlling valve therefor, said valve having an inlet, outlet and intermediate holding position, a constant speed reversible electric motor operatively connected to the valve to shift it to its several positions, means for actuating the motor to cause a rotation of the armature shaft in either direction to shift the valve to or from its holding position and including two sets of contacts, a pair of switch blades coacting with the respective sets of contacts, means normally urging said switch blades into engagement with said contacts, said contacts being thereby connected in an interrupted circuit with the motor and a source of energy, means for closing a circuit through the source of energy and either set of said contacts. and the corresponding switch blade to thereby actuate the motor, means for breaking the circuit through the active switch blade after the motor has opera-ted and the valve has moved to its se lected position from an intermediate closing position including a member oscillated by the motor, said member including two sections adjustable with. relation to each other and each of these sections having a shoulder, the respective shoulders coactinn' with the espective switch blades but benormally --,-paced therefron'i, a rotation of said shaft lid. member from an. intermediate position. ausing one of said shoulders to engage the active switch blade and shift it from its contact ei'igaging position after a predetermined rotation of the member to thereby break the circuit tlurough said motor, and means actuated by the movement of the meml'icr to its switch blade shifting position automatically closing at one point a reverse circuit through the motor and including a member mounted for oscillation on said first 1.,aaaass named IHBHIlJGI'S, and a switch blade oscillated. by said member, and means for completely closing the circuit through the last named means to cause the motor to revolve in the opposite direction, the re verse rotation of the motor causing the last named circuit closing means to break a circuit through the motor after the motor has moved in the reverse direction a predetermined amount and the valve has returned to its holding position.

12. In a hydraulic elevator, a constant speed reversible motor, circuit controlling means driven by the motor and reversible with the motor and including a member having two spaced shoulders, switch blades, contacts therefor with which the switdh blades are normally engaged, and means on said member operatively engaging one of said switch blades after a predetermined rotation of the motor upon a rotation of the member in one direction to shift the switch blade out of engagement with its contacts and adapted to operatively engage the other switch blade upon the reverse movement of the member after a predetermined rotation of the motor to shift the other blade out of engagement with its contacts.

13. In a hydraulic elevator, a constant speed reversible motor, a member driven thereby and reversible with the motor, a pivoted switch blade operatii' ely engaged with the member to be oscillated thereby upon an oscillation of the member in either direction, oppositely disposed pairs of contacts with which said switch blade is adapted to engage, switch blades disposed on either side of the first named switch blade, contacts coacting therewith, and means for urging said last named switch blades into engagement with their respective contacts, the oscillatable member having shoulders adapted to operatively engage with one or the other of the switch blades as the member oscillates in one or the other direction to the action of the motor and for a predetermined rotation of the motor to thereby break the circuit through said switch blades.

14. In a hydraulic elevator, a constant speed reversible electric motor having an armature shaft, aworni driven thereby. adisk like member mounted for rotation. and operatively enga g said. worm whereby-the disklike member may be shifted in reverse directions as the motor is rotated in reverse directions, the disk-like member being formed in three sections adjustable with relation to each other, a pivoted switch blade having one end. engaged with one of said sections and oscillated by an oscillation of the member in one direction or the other, oppositely disposed contacts with which the switch blade is adapted to be engaged, a central pair of contacts with Which said switch blade is in normal engagement when the motor stationary, a pair of switch blades pivoted on each side of the first named switch blade, contacts with which said switch blades are adapted to engage, and means for urging the switch blade ininto engagement with the contacts, one of said sections having thereon a shoulder adapted to engage with the adjacent switch blade to shift it out o'l engagement with its contacts when the member is rotated in one direction and alter a predetermined number of revolutions of the motor, and a shoulder on the third section adapted to operatively engage the other of said second named switch blades upon a rotation of the member in the opposite direction consequent upon the reversal of the motor and after a predetermined number of rotations of the motor.

15. In a hydraulic elevator, a main controlling valve having an inlet port and an outlet port, a pipe extending from the main valve to the elevator operating mechanism, manually controlled, electrically operated mechanism for controlling the main valve and including a plurality of circuits, a safety valve shifting the flow of water in the inlet pipe and normally held in an inoperative position but being urged to a closed position, and means for causing the closing of said safety valve upon an inter-- ruption occurring in any one of said circults.

1c. in a hydraulic elevator, a main controlling valve casing having an inlet port and an outlet port and having a pipe leading therefrom to the elevator operating mechanism, a safety valve casing in the length of said inlet pipe and between said main valve and the elevator operating mechanism, a safety valve in the casing adapted to close the inlet pipe and urged toward a closed position, and electro-magnetical'ly o]')crated means for holding the valve raised, said means being rendered inoperative by a breaking of the circuit through the magnet thereof to thereby permit the valve to close under the action of said urging means.

17. In a hydraulic elevator, a main valve casing having an inlet port and a discharge port. a valve operating therein, a pipe leading from the valve casing to the elevator operating apparatus. a safety valve disposed in the length of said pipe and adapted when actuated to prevent the passage of liquid therctinrough. said valve being urged to its closed position. electro-n1agnetically operated means for holding the valve raised. said means being rendered inoperative by a brcakiin); oi the circuit through the'magnet thereot to thereby permit the valve to close under the action of said urging means, and means tor gradually checking the closing of the valve under the action of the urging means.

18. In a hydraulic elevator, an inlet pipe, a normally open valve in the length of said inlet pipe but adapted to be closed to cut oil the inlet ot' water or the outlet of water :tron'i the inlet pipe, a lever operatively connected to the valve. a weightcarried by the lever and urging the lever to a position to close the val ve. a latch adapted to opcratively enga e the lever to hold it raised, an electro-magnet connected in a normally closed circuit with a source of current, said magnet when energized holding the latch in engagement with the lever and when doenergized releasing the lever, and a dash pot yieldingly resisting the closing of the valve.

19. In a hydraulic elevator, a reversible electric motor, a valve having an inlet position, an outlet position and an intermediate holding position and operatively connected to the motor to be shifted thereby from or to its intermediate holding position, means for directing the current through the motor in a direction to rotate the motor in one or the other direction to shift the valve from its intermediate holding position toward its.

inlet or its outlet position, means acting automatically to break the circuit through the motor when the valve has reached its inlet or its outlet position, means acting automatically to direct current through the motor in a direction to cause the valve to shift to its intermediate or holding position when the elevator has reached a predetermined position, and means acting auto matically to break the current through the motor when the valve has reached. its intermediate and holding position.

20. lln a hydraulic elevator, at controlling valve having an inlet position, an outlet position and an intermediate holding position, a constant speed reversible electric motor operatively connected to the valve to cause it to shift from its holding position in either direction toward or from its inlet or its outlet positions, selective means for directing current through the motor in either direction including a series of floor switches and a series of car switches mounted within the car, said switches acting as means tor directing current through the motor in a direction to shift the valve l'roin its intermediate holding position toward its inlet or its outlet position, means automatically acting to break the circuit through the motor when the valve has reached its inlet or out let position. said means acting simultaneously to break the circuit through the floor switches, means to direct current through the motor in a direction to cause the valve to move to its intermediate or holding position. and means for automatically breaking the circuit through the motor when the valve has reached its intermediate and holding position and reestablishing an interrupted circuit through said floorswitches.

21. A hydraulicelevator including a car, hydraulically actuated means for shifting the valve, a valve controlling the passage of water tosaid means, said valve having an inlet position, an outlet position and an intermediate holding position, a reversible constant speed electric motor operatively connected to the valve to shift it, a motor circuit interrupted at a plurality of points and adapted to send current through said motor in one direction, a second motor circuit interrupted at -a plurality of points and adapted to send a current through the motor in the ,other direction, a switch blade normally held in a closed circuit positionto partly close a circuit through the motor, a second switch blade normally held in an open circuit position andadapted when closed to complete the second circuit referred to, and motor operated means acting automatically to shift the first named blade .outof its circuit closing positionaiter the motor has operated a predetermined time and the valve has reachedone of its three positions and simultaneously shifting the second named blade into a circuit closing position whereby a circuit may be closed reversely through the motor to cause the reverse actuation thereof.

22. In a hydraulic elevator, a controlling valve therefor shiftable from an intermediate holding position to an inlet position or an outlet position, a constant speed reversible electric motor operatively connected to the valve, manually controlled means tlior closing a circuit through the motor in either direction to thereby cause the movement of the valve from its holding position in either direction, means for automatically breaking the circuit through the motor when the valve has reached a selected position to thereby permit the inlet or outlet of water and the ascent or descent of the elevator, means automatically closing a circuit through the motor reverse to the circuit last closed when the elevator has reached a predetermined position to thereby cause the valve to shift to its holding position and stop the elevator, and means breaking the said last named circuit when the valve has reached its holding position. i

23. In a hydraulic elevator. a controlling valve therefor .shiftable from an intermediate holding position in one direction to an inlet position and in the other direction to an outlet position, a constant speed reversible electric motor OPGI'ZLtlVGlY connected to the valve, manually controlled means for closing a circuit through the motor in either direction to thereby cause the movement of the valve from its holding position in either direction to one of its otherlpositions, means a the valve has reached its selected position to thereby permit the inlet or outlet of water and the ascent or descent of the elevator, an elevator actuated fioorstop switch, and means controlled by the elevator for actuating said floor stop switch to cause the closing of a circuit through the motor reverse to the circuit last closed when the ele vator has vactuated the floor vstop switch to thereby cause the valve to shift toward its holding position to thereby stop the elevator, and means breaking the motor circuit last closed when the valve has reached its holding position.

2a. In ,a hydraulic elevator, a hydraulically actuated car,,a constant speed reversible electric motor, a controlling valveropera tively connected to the motor to be shifted thereby and shitftable from an intermediate holding position in one direction to an inlet postion and in the opposite direction to an outlet postion, a pivoted up vdirection limit switch blade, a pivoted down direction limit switch blade, a pivoted reversing switch blade a series of relay switches, one for each floor, a series of holding magnets, one for each relay, a magnetically actuated up direction switch, a magnetically actuated down i direction switch, a series of floor starting switches, one for each floor, a series ofstarting switches on the car, one for each floor, a series of stop switches. one for each floor, means whereby to energize the corresponding relay when the corresponding floor switch or corresponding car switch is closed, means whereby to energize the corresponding holding magnet by the actuation of the corresponding relay, means actuated by the energizing of the holding magnet whereby to close a circuit through a source of power and both limit switch blades and one of the direction switches and the floor stop switch corresponding to the floor switch or car switch which has been actuated, means controlled by the energizing of the direction switch causing current to flow through the motor in one direction, means automatically actuated upon a predeten mined number of rotations of the motor automatically breaking the circuit through the limit. and direction switches to stop the motor but permitting the continued energize ing of the said holding magnet. and means automatically controlled by the arrival oi? the car at a predetermined 'lioor acting through the corresponding floor stop switch to break the circuit through the holding magnet and complete a circuit through the reversing switch blade to thereby reverse the direction oi current through the motor and shift the valve to holding position, and

means for automatically breaking the circuit thro gh the motor when the valve has reached i holding position.

25. In a hydraulic elevator, a hydraulically actuated car, a constant speed reversible electric motor, controlling valve operativeiy connected to the motor to be shifted thereby from an intermediate position to an outlet or an inlet position, manually controlled means for causing the current to travel through said motor in either direction to thereby cause the motor to rotate in a selected direction and shift the valve from its holding position to its inlet or its outlet position, means automatically breaking the circuit through the motor when the valve has reached its selected position, and means for completing a reverse circuit through the motor when the car has reached a predetermined selected floor or level including a longitudinally shiftable bar having an offset portion, means controlled by the movement of the car for shifting said bar longitudinally in one direction or the other, and a switch shifted from one position to another position by the engagement of said off-set with the switch.

26. In a hydraulic elevator, a hydraulically actuated car, a constant speed reversible electric motor, a controlling valve operatively connected to the motor to be shifted thereby from an intermediate position to an outlet or an inlet postion, manually controlled means for causing the current to travel througl'i said motor in either direction to thereby cause the motor to rotate in a selected direction and shift the valve from is holding position to its inlet or its outlet position, means automatically breaking the circuit through the motor when the Valve has reached its selected position, means for completing a reverse circuit through the motor when the car has reached a predetermined selected floor or level including a longitudinally shiftable bar having an oil'- set portion, means controlled by the movement of the car for shifting said bar longitudinally in one direction or the other, a switch shifted from one position to another position by the engagement of said off-set with the switch, and means automatically breaking said last completed circuit after the motor has rotated a sufficient number of revolutions to carry the valve to its holding position.

In a hydraulic elevator, a hydraulically actuated car, a constant speed reversibl electric motor, a controlling valve operatively connected to the motor to be shifted thereby from an intermediate position to an outlet or an inlet position, manually controlled means for causing the current to travel through said motor in either direction to thereby cause the motor to rotate in a selected direction and shift the valve from its holding position to its inlet or its outlet position, means automatically breaking the circuit through the motor when the valve has reached its selected posit-ion, means for com pletiug a reverse circuit through the motor when the car has reached a predetermined selected floor or level ii'icluding a longitudinally shit'tablc bar having an elf-set. a screw-threaded traveler connected to the bar, a worm on; ging the traveler, means operatively connected to the car for causing the rotation of the worm in one direction or the other as the car ascends or descends, and a switch adapted to be shifted by the move ment of the off-set portion of said bar with the switch when the car has reached a pre determined floor.

28. In a hydraulic elevator, a hydraulically actuated car, a reversible constant speed electric motor, a controlling valve operatively connected to the motor to be shifted thereby from an intermediate holding position in one direction to an inlet position and in the opposite direction to an outlet position, a series of manually operable fioor switches, one located on each floor, a series of manually operable switches corresponding to the several floors and located in the car, means actuated by the closing of any floor switch or any one of the car switches to close a circuit in a predeter mined direction through the motor to thereby cause the valve to shift toward its inlet position or its outlet position, means auton'iatically breaking the circuit through the motor when the valve has reached its selected position, means for completing a reverse circuit through the motor when the car has reached a floor corresponding to the car switch which has been closed or the floor switch which has been closed including a series of floor stop switches corresponding in number to the number of floors, an actuating member having an off-set portion adapted to successively engage said floor switches as the member is shifted in one direction or the other, car actuated means for shifting said member, and means for automatically breaking said last named circuit through the motor when the valve has reached its holding position.

29.. In a hydraulic elevator, a hydraulically actuated means, a constant speed electric motor, a controlling valve operatively connected to the motor to be shifted thereby and shiftable from an intermediate holding position to inlet position or an outlet position, a series of motor starting switches located on each floor, a series of motor starting switches located within the car and corresponding in number to the floors, means actuated by the closing of one of the floor switches and closing a circuit through the motor to cause it to operate in a predetermined direction to thereby shift the valve from its holding position to its inlet or its outlet position, means operated automati- Cally to break said circuit through the motor when the valve has shifted from its predetermined to its selected position to thus permit the car to ascend or descend, means breaking the circuit through all of the starting floor buttons and through any one 01' the floor switches when the circuit has been completed through the motor to cause the shifting of the valve from its intermediate holding position, means completing a reverse circuit through the motor when the car has reached a floor correspond ing to thatot the actuated switch to thereby cause the valve to return to its holding position, means then acting to automatically break the circuit through the motor when the valve has reached its holding position, and means again rendering the floor switches active when the valve has reached its holding position.

In testimony whereof- I hereunto affix my signature.

enonen LAWRENCE SLACK. 

